Below is the code I made for a simple html table. My goal is to center the entire table vertically in the center of the page based on the users height of the device. I tried to make a div with the height as 100% and width as 100% and placing the table 50% from top and left and no luck. Any ideas?
body {
    background-color: #a00000;
}
table {
    margin: 50px auto 25px auto;
    padding: 0px;
    background-color: #fff;
    border-radius: 10px;
}
td {
    background-color: #fff;
    padding: 10px;
    background-color: #fff;
    border-radius: 10px;
}
img {
    max-width: 120px;
    max-height: 120px;
    border: solid 5px #a00000;
    border-radius: 5px;
    background-color: #a00000;
}<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>Bobcat Menu</title>
        <meta content='width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0' name='viewport' />
        <link rel="stylesheet" href="css/style.css">
    </head>
    <body>
        <table align="center">
            <tr>
                <td>
                    <a href="mobincube://action/section/DropDay">
                        <img src="
https://s3-us-west-2.amazonaws.com/s.cdpn.io/837604/D.png" />
                    </a>
                </td>
                <td>
                    <a href="mobincube://action/section/Schedule">
                        <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/837604/S.png" />
                    </a>
                </td>      
            </tr>
            <tr>
                <td>
                    <a href="mobincube://action/section/Calculators">
                        <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/837604/C.png" />
                    </a>
                </td>
                <td>
                    <a href="mobincube://action/section/News">
                        <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/837604/N.png" />
                    </a>
                </td>      
            </tr>    
        </table>
    </body>
</html> 
     
     
    